Cast sock



FIG. 1 is a left side elevational view of a cast sock, showing my new design with the straps in closed attached condition;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a front perspective view thereof;

FIG. 8 is a rear elevational view thereof, with the strap in open unattached condition; and,

FIG. 9 is a front elevational view thereof.

The broken line showing of the extremity in FIG. 7 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a cast sock, as shown and described. 